目的探讨烙灸治疗早期激素性股骨头坏死(steroid-induced osteonecrosis of the femoral head,SONFH)的作用机制。方法将新西兰兔按随机数表法分为空白组、模型组、烙灸组、抑制剂组,每组6只,采用内毒素联合激素的方法制备SONFH模型。...目的探讨烙灸治疗早期激素性股骨头坏死(steroid-induced osteonecrosis of the femoral head,SONFH)的作用机制。方法将新西兰兔按随机数表法分为空白组、模型组、烙灸组、抑制剂组,每组6只,采用内毒素联合激素的方法制备SONFH模型。烙灸组进行4周的烙灸治疗,抑制剂组给予IκBα磷酸化抑制剂Bay11-7082(1 mg·kg-1)腹腔注射3周。干预前后分别观察实验兔一般状况变化;HE染色观察各组实验兔股骨头组织病理学变化;Western blot和RT-qPCR分别检测股骨头组织中IKKβ、磷酸化IκBα(p-IκBα)蛋白及mRNA的表达变化;ELISA检测血清中核因子κB(nuclear factor kappa-B,NF-κB)、肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)、白细胞介素-6(interleukin-6,IL-6)水平。结果与空白组比较,模型组实验兔逐渐出现精神萎靡、毛发暗淡等情况,股骨头组织骨小梁出现断裂、稀疏等改变,IKKβ、p-IκBα蛋白水平,IKKβmRNA水平及血清中NF-κB、TNF-α、IL-6水平均升高(P均<0.05);与模型组比较,烙灸组股骨头组织病理学改善,IKKβ、p-IκBα蛋白水平,IKKβmRNA水平及血清中NF-κB、TNF-α、IL-6水平均降低(P均<0.05),而IκBα蛋白及mRNA表达均升高(P均<0.05)。结论烙灸可改善早期SONFH骨代谢,缓解骨坏死,其机制与抑制TLR4/NF-κB通路有关。展开更多
The von Hippel-Lindau tumor suppressor protein(VHL),an E3 ubiquitin ligase,functions as a critical regulator of the oxygen-sensing pathway for targeting hypoxia-inducible factors.Recent evidence suggests that mammalia...The von Hippel-Lindau tumor suppressor protein(VHL),an E3 ubiquitin ligase,functions as a critical regulator of the oxygen-sensing pathway for targeting hypoxia-inducible factors.Recent evidence suggests that mammalian VHL may also be critical to the NF-κB signaling pathway,although the specific molecular mechanisms remain unclear.Herein,the roles of mandarin fish(Siniperca chuatsi)VHL(scVHL)in the NF-κB signaling pathway and mandarin fish ranavirus(MRV)replication were explored.The transcription of scVHL was induced by immune stimulation and MRV infection,indicating a potential role in innate immunity.Dual-luciferase reporter gene assays and reverse transcription quantitative PCR(RT-qPCR)results demonstrated that scVHL evoked and positively regulated the NF-κB signaling pathway.Treatment with NF-κB signaling pathway inhibitors indicated that the role of scVHL may be mediated through scIKKα,scIKKβ,scIκBα,or scp65.Co-immunoprecipitation(Co-IP)analysis identified scIκBαas a novel target protein of scVHL.Moreover,scVHL targeted scIκBαto catalyze the formation of K63-linked polyubiquitin chains to activate the NF-κB signaling pathway.Following MRV infection,NF-κB signaling remained activated,which,in turn,promoted MRV replication.These findings suggest that scVHL not only positively regulates NF-κB but also significantly enhances MRV replication.This study reveals a novel function of scVHL in NF-κB signaling and viral infection in fish.展开更多
近年来,IκB激酶β(inhibitor kappa B kinaseβ,IKKβ)在肿瘤发生发展过程中的作用逐渐被发现。IKKβ通过作用多种分子通路参与肿瘤细胞增殖、存活等过程,抑制IKKβ已被确定为治疗癌症有希望的手段。研究人员开发一系列IKKβ抑制剂,发...近年来,IκB激酶β(inhibitor kappa B kinaseβ,IKKβ)在肿瘤发生发展过程中的作用逐渐被发现。IKKβ通过作用多种分子通路参与肿瘤细胞增殖、存活等过程,抑制IKKβ已被确定为治疗癌症有希望的手段。研究人员开发一系列IKKβ抑制剂,发现它们能够有效抑制肿瘤的生长,但目前尚无IKKβ抑制剂投入到临床上治疗癌症。在这篇综述中,我们将介绍IKKβ介导肿瘤发生发展及主要IKKβ抑制剂的研究进展。展开更多
基金supported by the National Key Research and Development Program of China(2022YFE0203900)Guangdong Key Research and Development Program(2021B0202040002 and 2022B1111030001)+4 种基金China Agriculture Research System(CARS-46)Guangdong Basic and Applied Basic Research Foundation(2021A1515010647)Basic and Applied Basic Research Project of Guangzhou Science and Technology Plan Project(202102020299)Science and Technology Planning Project of Guangdong(2023B1212060023)Guangdong Laboratory for Lingnan Modern Agriculture(NZ2021018)。
文摘The von Hippel-Lindau tumor suppressor protein(VHL),an E3 ubiquitin ligase,functions as a critical regulator of the oxygen-sensing pathway for targeting hypoxia-inducible factors.Recent evidence suggests that mammalian VHL may also be critical to the NF-κB signaling pathway,although the specific molecular mechanisms remain unclear.Herein,the roles of mandarin fish(Siniperca chuatsi)VHL(scVHL)in the NF-κB signaling pathway and mandarin fish ranavirus(MRV)replication were explored.The transcription of scVHL was induced by immune stimulation and MRV infection,indicating a potential role in innate immunity.Dual-luciferase reporter gene assays and reverse transcription quantitative PCR(RT-qPCR)results demonstrated that scVHL evoked and positively regulated the NF-κB signaling pathway.Treatment with NF-κB signaling pathway inhibitors indicated that the role of scVHL may be mediated through scIKKα,scIKKβ,scIκBα,or scp65.Co-immunoprecipitation(Co-IP)analysis identified scIκBαas a novel target protein of scVHL.Moreover,scVHL targeted scIκBαto catalyze the formation of K63-linked polyubiquitin chains to activate the NF-κB signaling pathway.Following MRV infection,NF-κB signaling remained activated,which,in turn,promoted MRV replication.These findings suggest that scVHL not only positively regulates NF-κB but also significantly enhances MRV replication.This study reveals a novel function of scVHL in NF-κB signaling and viral infection in fish.
文摘近年来,IκB激酶β(inhibitor kappa B kinaseβ,IKKβ)在肿瘤发生发展过程中的作用逐渐被发现。IKKβ通过作用多种分子通路参与肿瘤细胞增殖、存活等过程,抑制IKKβ已被确定为治疗癌症有希望的手段。研究人员开发一系列IKKβ抑制剂,发现它们能够有效抑制肿瘤的生长,但目前尚无IKKβ抑制剂投入到临床上治疗癌症。在这篇综述中,我们将介绍IKKβ介导肿瘤发生发展及主要IKKβ抑制剂的研究进展。
